How to Join LinkedIn without an Invitation
Click the Confirm button to confirm the e-mail address for your account.
You’ll then be asked to log in to your account, so simply provide your e-mail address and password when prompted.
If you skip this step of confirming your e-mail with LinkedIn, you won’t be able to invite any connections, use functions like LinkedIn Answers, apply for jobs on the LinkedIn job board, or take advantage of most other LinkedIn functions.
You’ll be taken to your home page with a confirmation message that your e-mail address is confirmed.